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In this optics activity, learners conduct an experiment to explore peripheral vision. Learners collect data about their ability to see shapes, colors, or letters using their peripheral vision.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

Which one of your eyes are dominant? Do they act independently or are they equally "in control?" This activity explores how your eyes work (or don't work) together.

This activity (on page 2 of the PDF under SciGirls Activity: Colorblind Dogs) is a full inquiry investigation into dogs' ability (or inability) to see color.

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.

In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

In this lab (Activity #1 on page), learners explore how we see color.

In this activity, learners conduct an experiment to test how fast they can react. Learners try to catch a piece of paper with a ruler printed on it (or a ruler) as quickly as they can.

During this hands-on activity, learners are briefly exposed to moviemaking and animation, when they create their own thaumatropes.

In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.

In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye.

In this optics activity, learners build an animation tool to make mini movies. When you spin a phenakistascope, the pictures move so quickly that your eyes and brain can't separate the images.

In this activity, learners discover that it's difficult to distinguish between two different shades of gray when they aren't separated by a boundary.

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

Design and create an optical illusion toy that makes two pictures appear to become one. This is called a thaumatrope and will allow the learner to investigate the phenomenon of persistence of vision.

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

How can you make one shade of gray look like two? By putting it against two different color backgrounds! This activity allows learners to perform this sleight of hand very easily.

In this activity (3rd on the page), learners conduct a series of tests to find out which of their eyes is more dominant.

In this activity, learners make a Benham Top to explore visual illusions and optics.